high speed impedance tuning - maury microwaveyour calibration, measurement & modeling solutions...

Your Calibration, Measurement & Modeling Solutions Partner!

High Speed Impedance TuningFaster Measurements = Faster Time to Market

LXI Tuner ControlSwept-Adaptive Tuner Characterization

Mixed Signal Active Load Pull


Objectives -

Spend less time measuring DUTs and more time analyzing data

Faster cycle = faster time to market

Solutions –

Passive measurements

Faster tuners

Faster characterization methodologies

High speed active load pull systems

OBJECTIVE


LXI TUNER CONTROL

.TUN and .S2P files stored on memory

Embedded microprocessor with onboard mathematics and de-embedding

High-speed Ethernet and USB interfaces

USB MT- series tuner – 10 degree phase movement @ 2 GHz = 2.17s

LXI MT-series tuner – 10 degree phase movement @ 2 GHz = 0.55s


– Characterize one set of impedance states

– Point selection – based on non uniform phase spacing

– Sweep frequency at each state

Adaptive – 9-30 minutes per frequency (# points and VNA dependent)

Swept Adaptive – 11-45 minutes for all frequencies! (# points and VNA dependent)

SWEPT-ADAPTIVE TUNER CHARACTERIZATION


PASSIVE TUNER SUMMARY

CharacterizationMethod

Tuner Time for 600 point characterization

Adaptive MT-series USB tuner 15 minutes per freq (0.8 GHz, PNA)

Adaptive MT-series LXI tuner 11 minutes per freq (0.8 GHz, PNA)

Swept-Adaptive MT-series USB tuner 16 minutes for all freq (5 freq, PNA)

Swept-Adaptive MT-series LXI tuner 12 minutes for all freq (5 freq, PNA)

Tuner 10° step (avg pp) 20° step (avg pp) 40° step (avg pp)

MT-series USB 2.17s @ 2 GHz 2.26s @ 2 GHz 2.42s @ 2 GHz

MT-series LXI 0.55s @ 2 GHz 0.60s @ 2 GHz 0.66s @ 2 GHz


•Wideband AWGs to generate wideband signals

•Wideband A/D converters + digital signal processing to measure wideband reflection coefficients

•Up to 240 MHz modulation bandwidth.

•The RF test-set up-converts the baseband signals to RF frequency and down-converts the a and b waves for S-parameters measurements

•Available in 0.4 – 18 GHz , 0.5 – 26 GHz and 0.8 – 40 GHz frequency bands.

MT2000 SYSTEM


x = source (s) or load (l)

n = frequency band, e.g. baseband (0), fundamental (1) and harmonic (2 and up)

= user defined reflection coefficient vs. frequency

a1 inject

a1,n

b1,n

b2,n

a2,n

a2 inject

S11#

S21#

DUT

as

GS,n(fn) GL,n(fn)

, , ,( ) ( ) ( )x n n x n n x n na f b f f G, ( )x n nfG

MT2000 ALGORITHM


• Multiple powers and terminations can be measured at once, by using multiple time-segments with different amplitude and phase information

• Full synchronization between measurement and signal generation is used to track the info embedded in each wave segment

HIGH-SPEED LOAD PULL


• One waveform contains multiple loads and power levels

• The iterations to achieve the desired Gammas are performed on each individual segment

HIGH-SPEED LOAD PULL


10 mm GaN device

• peak output power ~ 10 W

• Measurement conditions

• Swept available power:

• 15 to 27 dBm (1 dB step)

• Swept load fundamental :

• 64 load impedances

768 measurement points in 30

sec!

MEASUREMENT RESULTS – HIGH SPEED


Optimum

fundamental load

69.2 % PAE @

35.3 dBm



• 50 W GaN HEMT

• 25 fundamental loads

• 5 2nd harmonic loads

• Source 2nd

harmonic short

• NVNA

• Les than 1 minute!



For the most up-to-date information regarding Maury’s high-speed impedance tuning solutions, please visit

www.maurymw.com

http://www.maurymw.com/

high speed impedance tuning - maury microwaveyour calibration, measurement & modeling solutions...

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